Yarn delivery guide means



Nov. 25, 1952 J; THOMAS 2,619,296

YARN DELIVERY GUIDE MEANS Filed June 17, 1949 E 2 SHEETSSHEET 1 IN VENTOR.-

P. J. THOMAS YARN DELIVERY GUIDE MEANS Nov. 25, 1952 2 Sl-IEETSSHE ET 2Filed June 17, 1949 AITaRZYL-Y,

Patented Nov. 25, 1952 YARN DELIVERY GUIDE MEANS Pacific J. Thomas,Wyoming, Pa., assignor to U. S. Textile Machine Company, Scranton, Pa.,a corporation of Pennsylvania Application June 17, 1949, Serial No.99,719

10 Claims.

This invention relates to reciprocable yarn delivery guide means fortextile machines of the yarn winding and twisting type adapted toprovide so-called headless yarn packages having tapered or inclined endconstruction.

The well known reciprocable yarn delivery guide devices heretoforeprovided for textile machines of the type indicated, are operated inunison, but each such device is arranged to serve a separate machinesection. Each device is provided with a free yarn delivery end that canbe manually moved, or swung, by the machine operator, from its operativeor yarn delivery position, to an inoperative position. The devices areunitedly operated by means arranged to constantly reciprocate the yarndelivery end of each device, back and forth across the particular yarnreceiving spool which it serves, while the machine is in operation, andwhen a particular device is swung to its inoperative position while themachine is in operation, the yarn guide element at the free end thereofwill not come to a complete standstill, but will continue to reciprocateto a certain extent. When the yarn breaks, or the bobbin being wound isfilled, in a particular machine section served by such a device, theoperator moves the device to its inoperative position, without shuttingdown the machine, and then performs the necessary spool changing andyarn rethreading operations. Since the device constantly reciprocates,even after the device is swung to its inoperative position, the machineoperator experiences more or less difliculty in placing the yarn intothe yarn guide element of the device, particularly when the machine isopcrating at high speed.

One object of my invention is to provide novel yarn delivery guide meansfor textile machines of the type indicated, which means overcomes thementioned and other difficulties.

Another object is to provide such means having certain structural andfunctional features of advantage over the similar means of the priorart.

An additional object is to provide such means which is relativelyinexpensive, as well as simple in construction and operation.

It is also an object to provide such means in the form of a unit whichcan be readily embodied in a textile apparatus of the type indicated, soas to form a standard or conventional part thereof, or which can besupplied as an attachment for such an apparatus to replace the similarmeans originally incorporated in the apparatus.

Another object is to provide a textile apparatus of the type indicated,having in combination with a yarn receiving bobbin, means for rotatingthe bobbin, and a reciprocating yarn delivery device provided with ayarn guide aperture, which device is mounted so as to be movable, orswingable, during operation of the apparatus, from an active location ofreciprocation where the yarn guide aperture is in yarn feeding positionadjacent said bobbin, to an inactive location of reciprocation where theyarn guide aperture is in rethreading position; of means arranged tomaintain the yarn guide aperture of said device on the center linedividing the reciprocating stroke length of the device while the latteris in its inactive location of reciprocation.

A further object is to combine with the parts of a textile apparatusrecited in the previous paragraph, of means including a novel camelement, or plate, which can be selectively mounted in variousstationary positions, so as to either maintain the yarn guide apertureof the yarn delivery device in fixed location while the latter is in itsinactive position of reciprocation, or to cause limited movement of theyarn guide aperture of the yarn delivery device along the center linedividing the reciprocating stroke length of the device, while the latteris in its inactive location of reciprocation.

With these and other objects in View, which will become more apparentfrom the following detailed description of one practical andillustrative form of my yarn delivery guide means for textile machinesshown in the accompanying drawings, the invention comprises the novelelements, features of construction and arrangement of parts incooperative relationship, as more particularly indicated by the heretoappended claims.

In the accompanying drawings:

Figure 1 is a partial vertical sectional View of one of the machinesections of a yarn winding and twisting apparatus of the type indicated,and shows one form of my invention applied thereto.

Fig. 2 is an enlarged top plan View of some of the parts illustrated inFig. 1, and shows certain of said parts in various positions, asindicated by dot-and-dash lines.

The novel yarn or strand delivery guide means of my invention isparticularly designed to facilitate the rethreading work of a machineoperator, when it becomes necessary for him to substitute an empty spoolor bobbin for the one which has been filled in a particular machinesection, or when the yarn or strand being wound onto a spool of such amachine section breaks during the winding operation.

As the description proceeds, it will become apparent that my inventionaccomplishes this purpose by simple means, which, under the conditionsmentioned, is arranged to maintain the yarn delivery guide element to berethreaded, at a certain inactive location during ontinued operation ofthe machine. Furthermoe, that the said location substantially coincideswith the location of the pivot point of movement carried out by the yarnguide arm, or finger, which carries the guide element, so that the yarnreceiving aperture of the guide element is virtually maintained at astandstill and can, therefore, be rethreaded without difficulty or lossof time.

Fig. 1 of the drawings generally discloses certain parts of a modernhigh speed winding and twisting machine having my invention appliedthereto.

The usual and well known parts of one of the plurality of similaraligned sections of such a machine generally comprise a yarn supplyspool I, arranged to feed a yarn Y through a fixed wire eyelet guide 2,over a stationary guide rod 3, to a pivotally mounted yarn guide device4. the upper or outer free end of which is provided with a standard yarndelivery element 4, arranged to deliver the yarn Y directly to a yarnreceiving spool 5, driven by a drum 6, that is secured to alongitudinally extending power operated shaft 1, which rotates all thedrums of the aligned machine sections in the direction indicated by thearrow in Fig. 1. The yarn delivery element 4 is usually provided with aninclined yarn guide E and has a yarn delivery point 4. The yarnreceiving spool 5 is detacha-bly mounted for free rotation andreplacement in the upper end of a yoke 8, and the lower end of thelatter is pivotally supported. all in accordance with the usualpractice. A tension spring 9 has one end secured to the yoke 8, asshown, and the other end fixedly anchored, so as to urge the yoke 8toward the drum 6 and thereby maintain the yarn receiving spool 5yieldingly in contact with the driving drum 6, during the yarn windingaction.

Also extending longitudinally of the machine along all the alignedsections thereof, is a fixed rail or bar I and an axially reciproca-tedtraverse rail II, that is operated in usual and wellknown manner bypower actuated means of the machine. The parts so far described are thestandard or conventional parts of a yarn winding and twisting machine ofthe type indicated.

The yarn delivery guide devices 4 of the prior art, are usually operatedby means causing the upper or outer free yarn delivery elements 4thereof to be moved laterally, back and forth across the respective yarnreceiving spools 5, so as to effect laying of the yarn thereon to buildup so-called headless yarn packages, having either straight or taperedends. When the yarn breaks, or the spool is filled, the yarn deliveryelement 4 of such a prior art device can be manually moved, or swung, bythe machine operator, from its operative position A. indicated in fulllines in Fig. 1, to its inoperative position B, indicated indot-and-dash lines in said figure. Due to the fact that such a prior artdevice 4 is supported, in one way or another, on the traverse rail II,and the latter continues to reciprocate axially, after the element 4 isswung to its said inoperative position B, the element t also continuesto reciprocate laterally, back and forth,

to a greater or lesser extent, depending upon the cam or other meansprovided in such prior art arrangements for efiecting actuation of theyarn delivery guide element 4. This sidewise motion of the element 4makes it difficult for the machine operator to rethread the latter,particularly when the machine is operating at high speed, and more orless time is lost by the operator in the performance of this task.

To eliminate this difiiculty and avoid the time loss resultingtherefrom, I provide novel means adapted to effect operation of the yarndelivery element 4 as usual, when the latter is in its operativeposition A. However, when the element 4* is swung to its inoperativeposition B, the said novel means will function to locate and maintainthe element 4 at a position such that the machine operator can quicklyand easily rethread the element 4 without difiiculty and loss of time.

The novel means provided for this purpose in accordance with myinvention, generally comprises a plate I2, which is adjustably securedin fixed position on the rail ID by two bolts I3 and I4, and providedwith a cam slot I5, having cooperatively mounted therein for movementtherealong, a cam roller I B, secured to the lower depending portion ofa laterally swingable bracket element I1, mounted for turning movementon a shouldered pivot stud I8, secured to a stationary bracket plate I9.The entire assembly comprising parts I6, I1, I8, and I9, is secured infixed relation to the machine traverse rail II by suitable means, suchas by machine screws 20.

The plate [2 is arranged so that its angular position on the rail I0 maybe varied to effect adjustment of the cam slot I 5 thereof and therebyselectively determine the yarn laying movement of the yarn deliveryelement 4. For this purpose the plate I2 is provided with an arcuateadjustment guide slot 2|, through which passes the shank of the bolt I4.By first slightly loosening the bolts I 3 and I4, the plate I2 can beangularly adjusted about the pivot bolt I 3, within the the limits ofthe slot 2|. The bolts I3 and I4 are then tightened to fix the plate I2in its adjusted position on the fixed rail I0.

Mounted on the swingable bracket element I! is a conventional yarn guidearm 4, having the standard yarn delivery element 4 mounted thereon atits outer free end. The opposite or lower end of the arm 4 terminates ina tubular construction, within which is pressed, or suitably held insome other manner, a bushing 22. The guide arm 4, element 4 and bushing22, are arranged to limitedly rotate, or swing, about the shank of anelongated mounting screw 23, secured in fixed position between two tabs24 and 25 integrall formed on the swingable bracket I I. The tabs 24 and25 are so arranged as to prevent the yarn guide arm assembly fromshifting in axial direction along the mounting screw 23 while the yarndelivery point 4 of the element 4* carries out its arcuate yarn layingmovement adjacent to the yarn receiving tube or bobbin 5, as determinedby travel of the roller I6, in cam slot 15, of the plate I2, duringreciprocal actuation of the traverse rail I I.

Operation.

In operation, the empty tube or bobbin 5, on which the yarn, or strandY, is to be wound, is rotated by frictional contact with the drivingdrum When the yarn delivery guide element i is properly threaded, asshown in Fig. 1, the yarn passes over the inner portion of the element 4through the yarn guide eye E, and under the outer portion of the element4*, so that when the yarn Y leaves the element 4 at the yarn feeding ordelivery point 4 and becomes tensioned, the yarn Y will hold the element4* suspended from contact with the yarn package being wound.

At the beginning of the yarn winding operation, the guide arm 4 isvertically inclined toward the tube 5, in determined relation withrespect to the pivot screw 23. As the traverse bar II reciprocates oroscillates in axial direction, back: and forth, to carry out itsdetermined stroke, the cam roller I5 moves along the cam slot '15,thereby causing the swingable bracket I! to move about pivot I8, aneffecting oscillating movement of the yarn feeding point 4 of theelement4 The longitudinal distance traveled-by the yarn feeding point 4, isgreater than thatitraveled by the traverse bar I I. As the layers ofyarn build up on the tube 5, the element 4 i's' urged away from the tube5 because of the increasing diameter of the yarn package. This movementof the element t causes the longitudinal travel of the thread deliverypoint 4 of thelement 4 to become progressively less as the diameter ofthe package becomes progressively'greater. This results in the formationof tapered ends on the yarn package.

When it is desired to produce a yarn package having straight ends,instead of tapered ends, this can be accomplished by adjusting the plateI2, so that the cam slot I5 thereof is parallel with guide arm 4* is inits horizontal or inactive position B and the machine is in operation.The extent of such movement carried out by the eye E depends upon theangular relation of the cam slot I5 with respect to the traverse railII.

After the tube 5 is supplied with a measured quantity of yarn, the usualautomatic means provided in such machines, functions to move thecompleted yarn package out of contact with the driving drum 6. Theoperator then moves the guide arm 4* to its horizontal or inoperativeposition B and substitutes an empty tube 5 for the completed yarnpackage while the machine is in operation. When this involvesrethreading of the element 4*, th procedure followed is the same asabove explained.

Of course, the novel yarn delivery guide means shown and described, canbe changed and modified in various ways without departing from the thetraverse rail I I, thereby causing the oscillating movement of theelement 4* to remain the same in length or extent throughout the entireyarn winding operation.

When the yarn Y breaks, the yarn package is moved out of contact withthe driving drum 6, and the guide arm 0 is manually moved by theoperator to its inoperative, or horizontal rest position B. The lengthof the guide arm 4 is such that when this arm is moved to its horizontalinactive position B, the center point of the aperture or eye E, of thedevice 4*, will be on a line C representing the central dividing line ofthe reciprocating stroke length of the device 4 when in its position B.Assuming that the cam plate I2 has been fixed in selected inclinedrelation to the traverse rail II, as shown in Fig. 2,

then the yarn guide aperture or eye E, will only carryout a slight orlimited movement toward and away from the yarn package, along theposition B. When the cam plate I2 is fixed in selected position so thatthe cam slot I5 is parallel invention herein disclosed and moreparticularly defined by the hereto appended claims.

I claim:

1. In a textile apparatus of the character described, the combinationwith a yarn receiving bobbin, means for rotating the bobbin, a traversebar, and a unit including a pivotally connected yarn delivery armprovided with a yarn guide aperture at the free end thereof; of meansmount- I ing the unit on the traverse bar so that the yarn ation of theapparatus including an active l0ca-' tion relative to the bobbin wherethe yarn guide aperture is adjacent the bobbin surface and travelstherealong and an inactive location where 21.03 the yarn guide apertureis unobstruotedly held in a substantially motionless rethreadingposition during the movement of the traverse bar.

2. In a textile apparatus of the character described, the combinationwith a yarn receiving bobbin, means for rotating the bobbin, a traversebar, and a unit including a pivotally connected yarn delivery armprovided with a yarn guide with the traverse rail II, to eilectproduction of straight end yarn packages, the guide member that the camslot I5 is parallel to the traverse rail II to produce straight end yarnpackages. When fixed in the first of said mentioned positio'ns, the yarnguide eye E will limitedly move along the center line C during the timethat the I:

aperture at the free end thereof; of means mounting the unit on thetraverse bar so that the yarn delivery arm is freely movable to projectfrom one side or the other of said traverse bar to a plurality ofselective locations and unobstructed positions of the yarn guideaperture substantially equi-distant from said traverse bar duringoperation of the apparatus including an active location relative to thebobbin where the yarn guide aperture is adjacent the bobbin surface andtravels therealong and an inactive location where the yarn guideaperture is unobstruotedly held in a substantially motionlessrethreading position, and means for imparting an arcuate movement to theyarn delivery arm when the yarn guide aperture is in its said activelocation.

3. In a textile apparatus of the character described, the combinationwith a yarn receiving bobbin, a traverse bar and means for rotating thebobbin; of a reciprocating yarn delivery guide device provided with ayarn guide aperture, pivot rocation where the yarn guide aperture is inyarn feeding position adjacent said bobbin to an inactive locationproviding a predeterm ned fixed rethreading position for the yarn guideaperture,"

and means including a stationaryica'm elernent for maintaining the yarnguide aperture of said device on the center line dividingt-hereciprocating stroke length of the device while the latter is in itsinactive location of reciprocation.

4. In a textile apparatus of the character described, the combinationwithta yarn receiving bobbin, a traverse bar and means for rotating thebobbin; of a reciprocating yarn delivery guide device provided with ayarnguide aperture, pivot meansconnecting said yarn delivery device tosaid traverse bar for arcuate movement of said yarn delivery guidedevice during operation of the apparatus, to project from one side ofthe traverse bar to the other and position the yarn guide aperturesubstantially equidistantly spaced from the traverse bar from an activelocation of reciprocation where the yarn guide aperture is in yarnfeeding position adjacent said bobbin on one side of the traverse bar toan inactive location providing an unobstructed predetermined fixedrethreading position for the yarn guide aperture on the other side ofthe traverse bar, and means including a stationary cam element and acooperatively arranged cam roller on said device for maintaining theyarn guide aperture of the latter on. the center line dividing thereciprocating stroke length of the device during movement of said yarndelivery device by said traverse bar,

5. In a textile apparatus of the character described, the comb'irrationwith a yarn receiving bobbin and means for rotating the bobbin; of ayarn delivery guide device provided with a yarn aperture, areciprocatively operated traverse rail, pivot means mounting said deviceon said traverse rail for reciprocation therewith and independentmovement thereof, from an activ position of reciprocation where the yarnguide aperture projects from one side of the traverse bar and is in yarnfeeding position adjacent said bobbin to project from the other side ofthe tra-' verse bar, an inactive position providing a predeterminedfixed and unobstructed rethreading position for the yarn guide apertureduring operation of the apparatus, of a freely rotatable cam rollersecured to said yarn delivery guide device, and a stationary cam elementarranged to effect actuation of said cam roller during reciprocation ofthe traverse rail so as to limitedly move the yarn guide aperture ofsaid device along the center line dividing the reciprocating strokelength'of the device While in its inactive location of reciprocation.

6. In a textile apparatus of the character described, the combinationwith a yarn receiving bobbin, means for rotating the bobbin; of a yarndelivery guide device provided with a yarn guide aperture, areciprocatively operated traverse rail, pivot means mounting said deviceon said traverse rail for reciprocation therewith and independentmovement thereof from an active position of reciprocation where the yarnguide aperture is in yarn feeding position adjacent said bobbin on oneside of said traverse bar to an inactive equi-distant position on theother side of said traverse bar providing a predetermined fixed andunobstructed rethreading position for the yarn guide aperture duringoperation of the apparatus, of a freely rotatable cam roller secured tosaid yarn delivery guide device, and a stationary cam element arrangedto effect actuation of said cam roller during reciprocation of thetraverse rail so as to maintain the yarn guide aperture of said devicesubstantially motionless lat- 8 erallyewhile the yarn guide aperture isin its unobstructed and fixed inactive position.

7. In a textile apparatus of the character described, the combinationwith a yarn receiving bobbin, means for rotating the bobbin; of a yarndelivery guide device provided with a yarn guide aperture, areciprocatively operated traverse, rail. pivot means mounting saiddevice on said traverserail for reciprocation therewith and independentmovement thereof from an active position of reciprocation where the yarnguide aperture is in yarn feeding position adjacent said bobbin to aninactive position providing an unobstructed predetermined substantiallymotionless rethreading position for the yarn guide apexture in a lateraldirection, of a freely rotatable cam roller secured to said yarndelivery guide device, and a stationary cam element which is adjustablymounted for selective positioning to effect actuation of said cam rollerduring reciprocation of the traverse rail so as to maintain the yarnguide aperture of said device in the substantially motionlessunobstructed location while the latter is in its inactive position withvariable active movements of the yarn guide aperture in the activeposition of said yarn guide delivery device. I

8. In a textile apparatus of the character described, the combinationwith a yarn receiving bobbin, means for rotating said bobbin and areciprocating traverse bar; of a normally fixed cam, a bracket pivotallysupported on said reciprocating traverse bar; of a normally fixed cam, abracket pivotally supported on said reciprocating traverse bar forswinging movement in the plane of reciprocation of the latter, a camroller carried by said bracket so as to move therewith and saidreciprocating-traverse bar in constant engagement with said cam tothereby cause swinging movement of said bracket during its reciprocationwith said traverse bar, and a yarn guide arm pivotally mounted on saidbracket for arcuate movement toward and away from said bobbin.

9. In a-textile apparatus of the character described, the combinationwith a yarn receiving bobbin, means for rotating said bobbin and a re-.ciprocating traverse bar; of a normally fixed cam, a bracket pivotallysupported on said reciprocating traverse bar for swinging movement inthe plane of reciprocation of the latter, a roller carried by saidbracket to as to move therewith and said reciprocating traverse bar inconstant engagement with said cam to thereby cause swinging movement ofsaid bracket during its reciprocation with said traverse bar, a yarnguide arm having a yarn guide aperture at its free end, means pivotallyconnecting said yarn guide arm and bracket so as to enable selectiveswinging movement'of the yarn guide arm from an active positionprojecting to one side of the traverse bar to an inactive positionprojecting to the other side of the traverse bar thereby bringing theyarn guide aperture of said arm from a selective position on one side ofsaid traverse bar to another selective position on the other side ofsaid traverse bar during reciprocation of the latter and while the saidcam roller is in constant engagement with said normally stationary cam.

-10. In a textile apparatus of the character described, the eombinationwith a yarn receiving bobbin, means for rotating said bobbin and areciprocating traverse bar; of a normally fixed cam adjacent saidtraverse bar, a bracket pivotally supported on said traverse bar so asto bodily move therewith in operative engagement with said cam so as tocause swinging movement of said bracket in the plane of reciprocation ofsaid traverse bar during reciprocation of the latter, a yarn guide armhaving a yarn guide aperture at its free end, means pivotally connectingsaid yarn guide arm and bracket for positioning of the yarn guide arm toproject to one side of said traverse bar for movement of the yarn guideaperture parallel to the reciprocating motion of said traverse bar andpositioning of the yarn guide arm to project to the opposite side of thetraverse bar for unobstructed limited movement of the yarn guideaperture substantially at right angles to said traverse bar.

PACIFIC J. THOMAS.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

